Valve-spring lifter tool



Sept. 4,1934. H, DURIYAGE VALVE SPRING LIFTER TOOL Filed July 15, 1933 Patented Sept. 4, 1934 1 UNITED STATES e. thenar OFFICE Application July 15, 1933, Serial No. 680,549 1 Claim. (ores-86.3)

My invention relates to tools of an accessory to. a particular poppet valve-spring job. Fig. 2 character which, by reason of their application, illustrates an enlarged side view'of the valve assist and expedite the use of other tools and spring lifter shown in Fig. 1. Fig. 3 illustrates a thereby render the performance of the particular view taken at one end of the valve-spring lifter. job an easier and speedier task. The invention Fig. 4 illustrates a front view of the valve-spring particularly relates to a valve-spring lifting tool lifter. 7 and provides a device for quickly and easily re- As is well known, mechanical repairs, for exlieving the valve-spring pressure on the stem pin ample, on internal combustion engines which of the valve-spring lock to permit withdrawal of involve the removal of the'poppet valves for purthe pin and subsequent removal of the valve head poses of grinding or replacement, are costly and and stem for purposes of grinding or repair. diflicult. One of the major factors which con- The invention is particularly adapted for use tributes to. the cost is the fact that the valves on poppet valves of the well known type and are usually located with respect to other parts of has, for its object, to provide an element for enthe engine and its frame at a point where ready gaging one end ofthe valve tappet guide and anaccessibility and freedom of operation is. prac- J9 other element for engaging the valve-spring tically impossible; The valves are usually locked washer,. the said elements being movable with in position by means of a washer and pin against respect to one another by a means controlled and whichthe valve-spring bears and might be more operated at a point remote from, and easilyacreadily removed if'the pressure exerted by the cessible to, the user. The invention therefore valve-spring were removed or diverted from the 7.5 eliminates much of the difiiculty and expense insaid pin. Various lever-acting tools have been volved in valve removing jobs. designed to perform this function, but in the The invention also provides means for mainmain have been objectionable for the reason that taining the valve-spring in a position of relief as the available space in which the tool operating related to the stem pin whereby the mechanic part may be swung or operated is usually limited so may, without the exercise of haste or of great by the occupancy of other parts of the engine and manual strength, remove the stem pin, or, in the for the reason that the attention of the operator case of reassembly, insert the stem pin, thus must be maintained on the said tool while rereadily disassembling and reassembling the valve. moving the pin to prevent the spring from escap- The invention has for its particular object to ing the influence ofthe lifting tool, thus limiting provide a foot element adapted to engage the end the full use of the operator's attention and hands of the tappet guide approximating the valve inthe removal of the pin from the valve stem.

spring, and a jaw element adapted to engage the The valve-spring lifting tool provided by my valve-spring washer, and means interconnecting invention has a generally U-shaped foot which is said foot and jaw elements for progressively movadapted to rest upon and substantially clasp the ing the elements with respect to each other, said end of the tappet guide. The foot is connected to means being operated or driven by ahandle 10- one end of a rack member and may be designed cated at a point easily accessible to the user; p to be removable therefrom for purposes of sub- The invention consists in other features and stitutionof similar foot members of various gauge advantages which will appear from the following nd dimension, dependent upon the size of the descriptions and upon examination of the drawtapp guide and pp head- A cated jaw ing. Structures containing the invention may member having flange portions, and adapted to partake of different forms and may be varied in engage and substantially clasp the Valve-spring their details and still embody the invention. To washer, is slidably supported on the rack member illustrate a practical application of the invention, by means of a movable frame. The movable I have selected a valve-spring lifter tool embodyframe is provided with a suitable pinion gear, the ing the invention, as an example of the various teeth of which are adapted to mesh with the teeth structures and details thereof that contain the of the rack member and thus, upon rotation of invention, and shall describe the selected structhe pinion gear, the bifurcated jaw will be moved ture hereinafter, it being understood that variarelative to the foot. The pinion gear is suitably tions may be made without departing from the keyed to a stub shaft having a yoked or Y-shaped spirit of the invention. The particular structure end portion. A discular link is pivotally supselected is shown in the accompanying drawing. ported between the legs of the Y-shaped end Fig. 1 of the accompanying drawing illusportion. A handle member having a lever arm,

I 1 trates a view of the valve-spring lifter as applied the end of which is yoked or Y-shaped, is pivotally has a U-shaped or bifurcated foot 2 whichis;

removably connected to an end of a rack member 3, as by a bolt and nut assembly-5; The foot 2 preferably has skirt or flange portions 6 which extend below the edges of the foot, forming a partial recess 8, which is adapted to receive and substantially clasp a tappet guide 10, such as illustrated in Fig. 1. Where the tappet guide varies in size, requiring a foot member of another size, substitution thereof .maybe-obtained by merely removing. the bolt and nut assembly. 5 and substituting another foot member 2.

In order to provide means for relieving the pressure of the valve-spring, such as the spring 11 shown in Fig. 1, upon the stem pin, such as the stem pin 12, to permit the withdrawal of the pin 12, a bifurcated jaw 15 is provided and is removably connected to a movable frame 16, as by the screws 20; The frame 16 partakes 'of general U-shape and is adapted to receive-the rack member 3 in the web thereof, through'which the rack member may slide, and in that connection the frame 16 operates as aguide to maintain the rack and jaw in a relatively constant angle.

The jaw 15, like the foot 2, is provided with skirted or flanged portions 17 forming a partial recess 18, which is adapted to receive and substantially clasp a valve-spring washer, such as the washer 19shown in Fig. 1; Various sizes of jaws 15 may be substituted to meet the varying exigencies of practice by removal of thescrews 20. Thus it will be seen that as the jaw 15 is moved along the rack 3, the pressure of the spring 11 will be borne by the jaw 15 and relieved as against the pin 12, permittingeasy removal of the pin.

In order to move the jaw llland frame 16 with respect to the foot 2 and along the rack 3, a'pinio'n gear 21 is rotatably supportedintheframe 16 on a stub shaft 22, to which it may be suitably keyed, as by the pin 23. The gear 21 is supported so that its teeth 24 are located in meshing relation with the teeth 25 of the rack 3. Thus upon rotation of the shaft 22, the frame 16 will be caused to move progressively over the rack member-3 and relative'to the foot 2.

The shaft 22 is connected for rotation to a suitable manually operable handle 26 by a means enabling rotation of the shaft at a point conveniently remote from the jaw 15 and therefore easily accessible to the user. The shaft 22 has a bifurcated end portion 27 forming legs 28. A discular link 29 is supported, as by the pin 30, between the legs 28. The handle 26 has a lever arm 31, the end of which is bifurcated, as at 33, forming legs 34, The legs 34 are each pivotally connected to the link 29by stub pins 36, at points substantially in a common plane with the pin 30 but rightangles thereto. It will be readily apparent that the handle 26 may be located at almost any angle with respect to the shaft 22 and be rotated to rotate the pinion gear 21 as described.

. I! desired. a suitable pawl 37 may be pivotally supported, as by the pin 38, on the frame 16 and be adapted to engage the teeth 24 of the pinion as the jaw 15 is moved away from the foot. The movement of the jaw may thus be made periodic, and the jaw will be locked in position to hold the spring. The pawl may be provided with a suitable trip bar 39 for disengaging the pawl from the pinion teeth.

The valve-spring liftingtool may be readily used in reassembly of the valve, as is appreciated by those skilled in the art. One end of the spring 11 may be placed in its normal position with respect to the valve stem guide, and the other and engaged by the jaw 15. The handle 26 may then be operated to compress the spring as before, and the pin 12 placed in position through the valve stem.

I claim:

A valvespring lifter comprising a bifurcated foot element having depending skirt portions adaptedto receive within their confines the valve tappetj a bifurcated jaw element having upstanding skirt-portions adapted to receive within their confines the valve-spring washer, a rack member, I

the foot element having an opening adapted to slidably receive onecnd of the rack member, a bolt for removably locking'the said end of the rack member in the said opening, a U-shaped frame, bolts for removably connecting the jaw member to tl1e'U-shape d frame, the rack member disposed for reciprocatory movements in the web portion ofthe U-shaped frame, a pinion gear rotatably mounted on the U -shaped frame and disposed for engagement with the rack, a shaft keyed to the pinion gear, manually operable means connected to the'shaft for rotating the pinion gear, a pawlpivotally mounted on the frame and biased against the pinion gear to normally restrict the movement of the pinion gear to but one direction, I?

and a hand operated lever for overcoming said bias and for releasing the pinion gear.

HERMAN L. DURIVAGE. 

